One cool thing about Windows 8: it works really well with the latest version of Splashtop from an Android tablet, since Splashtop now uses Windows 8's built-in touchscreen device support. You can use Windows 8's own onscreen keyboard and everything.
One odd thing: whenever Fallout New Vegas crashes on me, it takes down Metro altogether. No more start menu unless using a start menu replacer. What?
One annoying thing: The task manager, while very nice, takes forever to start.